HİDROLİK SİSTEMLERDEKİ ENERJİ VERİMLİLİĞİ

Yıl 2018, Cilt: 23 Sayı: 2, 241 - 254, 31.08.2018

H. Sevil Ergür

https://doi.org/10.17482/uumfd.321820

Cited By: 1

Öz

Bu çalışmada,
keyfi başlangıç fonksiyonuna sahip hafifçe eğri bir kirişin lineer olmayan
titreşimleri ele alınmaktadır. Her iki ucundan elastik mesnetler kullanılarak
kiriş, boyuna yönünde kısıtlanmıştır. Başlangıçta sinüsoidal eğrilik
fonksiyonuna sahip olduğu varsayılan kiriş için, ulaşılan eğrilik yüksekliğinin
izdüşüme oranı 1/10 alınmaktadır. Euler-Bernoulli tipinde olan kiriş Winkler
elastik zemini üzerine oturmakta ve üzerinde keyfi olarak yerleştirilmiş
kütleler taşımaktadır. Hamilton prensibi kullanılarak hareket denklemleri elde
edilmiştir. Zeminden ve kiriş uzamasından dolayı matematiksel modelde kübik ve
quadratik lineer olmayan terimler ortaya çıkmaktadır. Hareket denklemlerini
analitik olarak çözümlemek için bir Pertürbasyon tekniği olan Çok Ölçekli
Metod(MMS) kullanılmaktadır. Geçici-durum titreşimleri süresince baskın
rezonans durumu dikkate alınmaktadır. Mesnetlerin tipleri, kütlelerin konumları
ve zeminin lineer bileşeni gibi farklı mukayese parametreleri için doğal
frekanslar elde edilmektedir. Genlik-faz modülasyon denklemleri kullanılarak
frekans-genlik ve frekans-cevap grafikleri çizilmiştir.

 

Anahtar Kelimeler

Hidrolik devre, Hidrolik motor, Elektro-hidrolik hareketlendirici, Basınç dengeli Hidrolik sistem

Energy Efficiency in Hydraulic Systems

Öz

The development of hydraulic systems and the reduction of energy losses
have provided by very serious scientific studies related to these systems
recently. Energy losses consist of friction in pipes,
equipment, elbows and diameter changes. The hydraulic pressure losses that
cause the heat increase will require the use of a cooler, as it will damage the
system. Another energy loss is due to fluid leakages, which are initially small
but increase over time. In addition, the fluid returning to the tank through the
safety valve also increases the energy loss. Equipment and technological
improvements, in hydraulic systems, reduce the energy losses. In order to
facilitate the pressure control in the system, the high-pressurized liquid
discharge in return line, passed through the safety valve installed into the closest
to the pump is increased. The role of the hydraulic system in industrial
development is increasingly taking the place of digital control systems, which
is a much more economical alternative. In this study, conventional and energy
efficient systems are compared with valve and pump-controlled mobile devices.

Anahtar Kelimeler

Hydraulic circuit, Hydraulic motor, Electro-hydraulic actuator, Pressure compensated Hydraulic system

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